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On September 15, two rare tidal bores showed up on the Qiantang River in eastern China. Sandbars split the incoming tide, forming a butterfly-shaped cross wave and a three-pronged wave nearby.
On September 15, two rare tidal bores showed up on the Qiantang River in eastern China. Sandbars split the incoming tide, forming a butterfly-shaped cross wave and a three-pronged wave nearby.